/Engine/Source/Runtime/Engine/Public/PackedLevelActor/PackedLevelActorBuilder.h
Creates/Updates aAPackedLevelActorBlueprint from InLevelInstance (will overwrite existing asset or show a dialog if InBlueprintAsset is null)
bool CreateOrUpdateBlueprint ( [ILevelInstanceInterface](API\Runtime\Engine\LevelInstance\ILevelInstanceInterface) * InLevelInstance, [TSoftObjectPtr](API\Runtime\CoreUObject\UObject\TSoftObjectPtr)< [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) > InBlueprintAsset, bool bCheckoutAndSave, bool bPromptForSave )